PopTray started as a little POP3 mail checker I wrote, because I couldn't find a freeware program that had all the features I wanted. Since then, new features have been added by request. After years of refinement PopTray 3.0 has now become a full-featured, customizable, e-mail notifier, but keeping it's ease of use.

Main Features:
Unlimited number of Accounts
Show number of messages directly on the TrayIcon (rotating by account)
Quickly preview a message
Delete messages from the server without downloading them
Rules that identify a message according to your criteria, then does one of these actions:
Play different notification sound
Delete from the server
Run any EXE file
Mark as Spam
etc ...
Configurable Hot-keys/Mouse-Buttons/Command-Line options for most functions
Plug-in Support:
Protocol plug-ins (e.g. IMAP4, POP3SSL, Hotmail, etc.)
Notify plug-ins (e.g. Flashing scroll-lock light)
Spam management using rules and white/black lists
Mulitple notfications (play sound, pop-up, etc)
Translated into 30+ languages
Complete Install / Uninstall
Many More ...
Download PopTray 3.1 Beta 7